Periodontal disease o a gum disease is another risk factor of a bad breath. This condition occurs with the presence of distinctive active gum disease that is present. According to the experts, periodontal disease is the secondo most common cause of bad breath in people over the age of 35. As we age, we are più likely to have unhealthy gums. Periodontal disease is a bacterial infection that is located down in the tissues that surround the teeth. It leads to serious damage of the bone that holds the teeth in place. When this damage to the bone happens, deep spaces form between the gum and teeth. Unfortunately, these pockets provide an ideal location for bacteria to thrive.